EP 0915421 B1 20010307 - Semiconductor memory device capable of preventing malfunction due to disconnection of column select line or word select line
Title (en)
Semiconductor memory device capable of preventing malfunction due to disconnection of column select line or word select line
Title (de)
Halbleiterspeichergerät, um Fehlfunktion durch Spaltenauswahlleitungsunterbrechung oder Zeilenauswahlleitungsunterbrechung zu vermeiden
Title (fr)
Dispositif de mémoire à semi-conducteur capable d'éviter le disfonctionnement dû à la déconnexion de lignes de sélection de colonnes ou de mots
Publication
Application
Priority
- EP 97103040 A 19970225
- JP 4525596 A 19960301
- JP 19820496 A 19960726
Abstract (en)
[origin: EP0793176A2] A column select line (CSL) includes a first layer column select line (CSLB) and a second layer column select line (CSLA) formed above the first layer column select line (CSLB) and connected thereto at any point. Furthermore, clamping circuits (7, 9) each for clamping each word line of paired main word lines (MWL, /MWL) at a constant potential are provided in a semiconductor memory device having main and secondary word line structure. With such a structure, malfunction due to multiselection of memory cells can be avoided even when the column select line (CSL) or the paired main word lines (MWL, /MWL) is disconnected. <IMAGE>
IPC 1-7
IPC 8 full level
G06F 11/20 (2006.01); G11C 8/08 (2006.01); G11C 8/10 (2006.01); G11C 29/00 (2006.01)
CPC (source: EP US)
G06F 11/2007 (2013.01 - EP US); G11C 8/08 (2013.01 - EP US); G11C 8/10 (2013.01 - EP US); G11C 29/70 (2013.01 - EP US); G11C 29/78 (2013.01 - EP US); G11C 29/832 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0793176 A2 19970903; EP 0793176 A3 19970917; EP 0793176 B1 19990602; DE 69700241 D1 19990708; DE 69700241 T2 19991104; DE 69704204 D1 20010412; DE 69704204 T2 20010712; EP 0915421 A2 19990512; EP 0915421 A3 19990623; EP 0915421 B1 20010307; US 5825694 A 19981020; US 5986915 A 19991116
DOCDB simple family (application)
EP 97103040 A 19970225; DE 69700241 T 19970225; DE 69704204 T 19970225; EP 99103686 A 19970225; US 15473498 A 19980917; US 80700797 A 19970226